In the next three years, that project will add 39 gates across all three concourses, a 35 percent increase in the number of regular boarding positions. Concourse B, the largest, is expected to see new gates open first, with four ready for boarding on its west end by 2020.

"We will not only increase capacity, but we will add more passenger amenities, including food and shopping, charging stations and even outdoor space where you can enjoy Colorado's beautiful weather and scenery," airport CEO Kim Day said during the groundbreaking ceremony, according to a news release.

Since the expansions will occur at the ends of the concourses, the impact on passengers is expected to be minimal.